<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>{% if page.title %}{{ page.title | escape }}{% else %}{{ site.title | escape }}{% endif %}</title>
  <meta name="description" content="{{ page.excerpt | default: site.description | strip_html | normalize_whitespace | truncate: 160 | escape }}">
  <link rel="stylesheet" href="{{ "/assets/my.css" | relative_url }}">

  <link rel="canonical" href="{{ page.url | replace:'index.html','' | absolute_url }}">
  <link rel="alternate" type="application/rss+xml" title="{{ site.title | escape }}" href="{{ " /feed.xml " | relative_url }}">
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
  <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
  <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" >
  <!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
  <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js" ></script>
  
  {% if jekyll.environment == 'production' and site.google_analytics %}
  {% include google-analytics.html %}
  {% endif %}
</head>
